Answer: 
I suppose 17x^ means 17x².
and that we must solve the equation.
Step-by-step explanation:

Idk...
what did the doctor say?
1 + (-5) becomes 1 - 5 because you are adding a negative number.
1 - 5 is -4
Answer : -89
Explanation: 10 times -7 is -70. -70 minus 19 is -89.
They intersect at a right angle